Structural characterization, material properties and sensor application study of in situ polymerized polypyrrole/silver doped titanium dioxide nanocomposites

Ramesan, M. T.; Santhi, V.; Bahuleyan, Bijal Kottukkal; Al‐Maghrabi, M. A.

doi:10.1016/j.matchemphys.2018.02.040

Cited by 50 publications

(25 citation statements)

References 35 publications

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“…Combination of metal nanoparticles with functional groups can effectively interact with PANI will increases the conductivity and dielectric properties. Among the various nanoparticles, researchers are much interested in titanium dioxide (TiO 2 ) nanoparticles due to its good physicochemical properties, nontoxic, crystalline structure, and structural stability . The major difficulty associated with the fabrication of nanocomposite is the agglomeration of nanofillers in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

2019

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We report the preparation, characterization, and properties of polyaniline (PANI)/ phenothiazine (PTZ) blend with different concentration of titanium dioxide (TiO 2 ) nanoparticles. Formation of nanocomposites was monitored by Fourier transform infrared spectra, UV, X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), differential scanning calorimetry (DSC), and thermogravimetric analysis studies. Spectroscopic characterization confirmed the bonding structure of PANI/PTZ/TiO 2 composite through the shift in absorption peaks of nanocomposites compared to pure PANI/PTZ blend. XRD studies confirmed the presence of sharp crystalline peaks of TiO 2 in the blend system signifying good interaction among the adjoining molecular chain of polymer with the nanoparticles. Surface morphological details of the nanocomposites obtained using SEM and HR-TEM reveal the formation of hemispherical-like structures with a diameter of 15 to 30 nm. DSC measurements of these nanocomposites showed that the glass transition temperature was reduced as the concentration of TiO 2 increased into PANI/PTZ blend matrix. The influence of filler loading on thermal stability showed that the TiO 2 enhanced the thermal stability and reduced the rate of thermal degradation of polymer blend nanocomposites. Conductivity studies showed that both AC and DC conductivity, dielectric constant, and dielectric loss increase with an increase in the concentration of nano-filler TiO 2 up to 10 wt%. Similarly, the ammonia gas sensing behavior of nanocomposites was also improved by the addition of nanoparticles. From the characterization studies, it can be suggested that TiO 2 helps to achieve excellent thermophysical properties, gas sensing, electrical conductivity, and dielectric characteristics for PANI/ PTZ blend which can be used in the fabrication of electrical or nano-electronic devices.

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Section: Introductionmentioning

confidence: 99%

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

2019

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“…Further, a sharp intense peak appeared at 496 cm −1 due to the presence of metal oxide (ZnO) group stretching . Main characteristic vibration peaks of pure PPy/PTZ blend are observed at 3396 and 2,908 cm −1 are the typical NH and CH stretching vibration of blend domains, respectively . The absorption peaks at 1545 and 1,455 cm −1 are assigned to the stretching vibrations of CN bond in the blend.…”

Section: Resultsmentioning

confidence: 99%

“…Ag‐doped ZnO is utilized in various optoelectronic applications . In our group, several conducting polymer nanocomposites based on polyaniline, polypyrrole, and polyindole have been synthesized, and they exhibited good conductivity and processability . Among the family of conducting polymers, the major drawback of using polypyrrole in EMI shielding application is the lack of mechanical properties resulting from the irregular structure of the polymeric backbone.…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

Ramesan

Greeshma

Parvathi

et al. 2019

Vinyl Additive Technology

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The main aim of this study is to investigate the effect of silver-doped zinc oxide (Ag-ZnO) loading on the structural, morphological, thermal and electrical properties, and gas sensing behavior of polypyrrole (PPy)/phenothiazine (PTZ)-blend nanocomposites. The composites are characterized by FTIR, XRD, SEM, TEM, DSC, TGA, and impedance studies. FTIR spectra exhibit the presence of Ag-ZnO in the PPy/PTZ blend. XRD analysis shows that the semicrystalline behavior of the polymer blend is greatly enhanced by the addition of Ag-doped ZnO particles. Uniform dispersion of nanoparticles in the polymer is obtained from SEM analysis. The TEM images confirm the presence of spherically shaped nanoparticles in PPy/PTZ blend with a size of 10-25 nm. The DSC measurement indicates that the glass transition temperature of PPy/PTZ blend was significantly improved in the presence of Ag-doped ZnO nanoparticles. The thermal decomposition temperature of nanocomposite obtained from TGA shows an increase with increase in the content of Ag-ZnO particles. The incorporation of Ag-doped ZnO nanoparticles to PPy/PTZ blend exhibit increase in the AC conductivity and dielectric properties of the nanocomposite, due to the pilling of charges at the extended interface of the composite system. The DC conductivity of the nanocomposite increases with the loading of nanoparticles. The ammonia gas sensing performance of PPy/PTZ/Ag-ZnO nanocomposite is analyzed, and the result shows that the fabricated blend composite can be used as a promising candidate for the easy access of gas molecules. Intensity (counts) FIG. 2. XRD patterns of Ag-doped ZnO, PPy/PTZ blend with different contents of Ag-doped ZnO. PPy-PTZ PPy-PTZ/ 5 wt % Ag-ZnO PPy-PTZ/ 7 wt % Ag-ZnO PPy-PTZ/ 10 wt % Ag-ZnO PPy-PTZ/ 15 wt % Ag-ZnO Tan Log frequency (Hz) FIG. 9. Dielectric loss tangent versus frequency plots for PPy/PTZ blend with Ag-doped ZnO nanoparticles. [Color figure can be viewed at wileyonlinelibrary.com]

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“…The ammonia (100 ppm) gas sensing ability of the PANI with different loading of Cu‐Al 2 O 3 nanoparticles were carried out. The experimental setup for the gas sensing study was described in the previous work . The response or sensitivity of gas was determined as:

normalS = \frac{(Rg - Ro)}{Ro}

where, Rg and Ro are the measured resistances of sensors in ammonia and air, respectively.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, characterization, gas sensing, and electrical property evaluation of polyaniline/copper‐alumina nanocomposites

2019

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A series of organic‐inorganic hybrid of polyaniline (PANI)/copper‐alumina (Cu‐Al2O3) nanocomposites were prepared by in situ polymerization technique. The structural, morphological and thermal properties of PANI with different contents of nano Cu‐Al2O3 were characterized by Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction analysis (XRD), scanning electron microscopy (SEM), high‐resolution transmission electron microscope (HR‐TEM), differential scanning calorimetry (DSC), and thermogravimteric analysis. The dielectric constant, dielectric loss and the AC conductivity were measured using a dielectric analyzer in a frequency ranging from 100 Hz to 1 MHz. Also, current (I)‐voltage (V) characteristics and gas sensing performance of the composites were studied in detail. The FTIR spectra of composite exhibited the IR band of nanoparticles in the macromolecular chain of PANI. The XRD pattern showed the systematic arrangement of Cu‐Al2O3 particles in the molecular structure of polyaniline. The SEM and TEM images indicated that the nanoparticles were sheathed by polyaniline. DSC results showed that incorporation of Cu‐Al2O3 accelerated the glass transition temperature of PANI. TG analysis demonstrated the enhancement in thermal stability of PANI/Cu‐Al2O3 nanocomposite relative to the base polymer. Conductivity studies showed that both AC and DC conductivity, dielectric constant, and dielectric loss increased with increase in the concentration of nanoparticles up to 5 wt%. Similarly, the ammonia gas sensing behavior of nanocomposites was also improved by the addition of Cu‐Al2O3 nanoparticles.

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Structural characterization, material properties and sensor application study of in situ polymerized polypyrrole/silver doped titanium dioxide nanocomposites

Cited by 50 publications

References 35 publications

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

Influence of titanium dioxide nanoparticles on the structural, thermal, electrical properties, and gas sensing behavior of polyaniline/phenothiazine blend nanocomposites

Structural, electrical, thermal, and gas sensing properties of new conductive blend nanocomposites based on polypyrrole/phenothiazine/silver‐doped zinc oxide

Synthesis, characterization, gas sensing, and electrical property evaluation of polyaniline/copper‐alumina nanocomposites

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